| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [be] [vb pp] [prep] [art] | 3987 |
|
| 2 | should [be] [vb pp] [prep] [art] | 3987 |
|
| 3 | [modal v] [be] [vb pp] [prep] an | 1685 |
|
| 4 | should [be] [vb pp] [prep] a | 1193 |
|
| 5 | should [be] [verb] [prep] an | 222 |
|
